摘要：本应用笔记介绍了如何可以变暗CCFL灯管和用户如何最大限度地利用DS3881和DS3882CCFL控制器的CCFL逆变器的调光比。注意提供在汽车，工业和航空电子应用的实际实现的准则。
Maxim>AppNotes>AUTOMOTIVEKeywords:CCFL,LCD,Automotive,Displays,DimmingRatio,coldcathodefluorescentlampFeb08,2007APPLICATIONNOTE3997HowtoAchievea300:1DimmingRatiowiththeDS3881/DS3882CCFLControllersAbstract:ThisapplicationnotedescribeshowCCFLlampscanbedimmedandhowausercanmaximizethedimmingratioofaCCFLinverterbyusingtheDS3881andDS3882CCFLcontrollers.Thenoteoffersguidelinesforpracticalimplementationsinautomotive,industrial,andavionicapplications.IntroductionTheDS3881andDS3882arecontrollersforcold-cathodefluorescentlamps(CCFLs)thatbacklightliquidcrystaldisplays(LCDs)inautomotive,industrial,andavionicapplications.Thesedesignsystemsoftenrequireawidedimmingratio.Anexa
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